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A Journal on Sports Medicine

Official Journal of the Italian Sports Medicine Federation
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Medicina dello Sport 2008 June;61(2):139-46

language: English, Italian

The effects of a pre-exercise carbohydrate-ectrolyte ingestion on maximum aerobic capacity in elite soccer players

Jourkesh M. 1, Ostojic S. M. 2

1 Department of Physical Education and Sports Science, Islamic Asad University, Shabestar Branch, Iran
2 Faculty of Sport and Tourism, PA University of Novi Sad, Serbia


Aim. The purpose of this study was to examine the effects of a pre-exercise carbohydrate-electrolyte drink on maximum aerobic capacity.
Methods. Twenty male elite soccer players volunteered to participate in the study. Each player performed two randomized trials of a V.O2max treadmill test within a week of each other. Players in this randomized, placebo controlled, counter balanced, crossover design, ingested either a placebo (water) or carbohydrate-electrolyte drink (6% carbohydrates, sodium 24 mmol·l-1, chloride 12 mmol·l-1, potassium 3 mmol·l-1) 30 minutes before each exercise bout. V.O2max and time to exhaustion during graded exercise testing were evaluated.
Results. Using paired samples t-tests, significantly greater mean values were found in VO2max and time for the pre-exercise carbohydrate-electrolyte drink trial compared to the placebo trial (P<0.05). The main finding of the present study indicates that supplementation with a pre-exercise carbohydrate-electrolyte drink improved V.O2max and time to exhaustion.
Conclusion. This suggests that soccer players should consume carbohydrate-electrolyte fluid prior a game to enhance V.O2max in specific skill performance.

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